tle5011 Infineon Technologies Corporation, tle5011 Datasheet - Page 43

• Manufacturer Part Number: tle5011
• Description: Gmr Based Angular Sensor
• Manufacturer: Infineon Technologies Corporation

10.1
This section identifies the requirements for CRC generation:
• This CRC is defined according to the
• Every new transfer resets the CRC generation.
• Every byte of a transfer will be taken into account to generate the CRC (also
• Generator Polynomial: X8+X4+X3+X2+1, the fast CRC generation circuit is
• The remainder of the fast CRC circuit is initially set to 11111111
• The remainder is bit inverted before transmission.
Figure 13
The zero extension for initial CRC calculation is included!
Figure 13
10.2
The position of the 0 in a nibble corresponds to the given slave number.
The slave active byte (cccc_nnnn) consists of:
• low nibble (nnnn). One 0 is generated always according to the slave number.
• high nibble (cccc). The 0 is only generated, if the readback CRC is correct.
Slave1: S_NO = 0
Slave2: S_NO = 1
Slave3: S_NO = 2
Slace4: S_NO = 3
Example for a communication disturbed by other bus participants:
Slave1: S_NO = 0
> Slave Active Byte: 1111_1110
Target Data Sheet
TX_CRC
Input
Class B Data Communication.
the sent command(s)).
used for CRC generation. (See
xor
shows the fast CRC Polynomial.
CRC Generation
Slave Active Byte Generation
Fast CRC Polynomial Division Circuit
&
1
bit 0 is pulled low
bit 1 is pulled low
bit 2 is pulled low
bit 3 is pulled low
bit 0 is pulled low, but the high nibble remains as ’1111’.
X0
1
X1
xor
1
X2
Figure
parallel Remainder
xor
J1850
43
Slave Active Byte: 1110_1110
Slave Active Byte: 1101_1101
Slave Active Byte: 1011_1011
Slave Active Byte: 0111_0111
13)
1
X3
Bus-Specification of 15.Feb.1994 for
xor
Data Communication via SSC
1
X4
1
X5
B
1
.
X6
1
V 0.11, 2008-01
X7
TLE5011
output
Serial
CRC